Login vs. typeahead

[herrickd at iccgcc.decnet.ab.com]

In article <1990Nov13.235307.9263 at athena.mit.edu>, jik at athena.mit.edu (Jonathan I. Kamens) writes:
> In article <71572 at iuvax.cs.indiana.edu>, speelmo at bronze.ucs.indiana.edu (Lance Speelmon -- UCS) writes:
> |> The machines that we have here also act the same way.  I don't think
> |> that there is any way to change that.  I could be wrong though.
> 
>   If you really want to change it, which (as I said in my previous posting) is
> probably a bad idea, it is easy to do so as long as you have source code.  You
> change the getpass() routine in the C library so that it uses TIOCSETN instead
> of TIOCSETP when doing the ioctl to turn off echoing.

But this does not fix the problem, only changes it.  You need to also
dig into the program that reads the username and turn off echo so the
beginning of the password does not appear on the terminal.
> 
>   If you don't have source code, it is still possible to change it if you know
> what you're doing and you have unstripped binaries.  If you want to change
> individual programs, you load them into adb, find the getpass() routine, find
> the call to ioctl, and change the TIOCSETP constant to TIOCSETN.  If you want
> to change it for everything, you do the same thing on the C library.
> 
> -- 
> Jonathan Kamens			              USnail:
> MIT Project Athena				11 Ashford Terrace
> jik at Athena.MIT.EDU				Allston, MA  02134
> Office: 617-253-8085			      Home: 617-782-0710

dan herrick
herrickd at astro.pc.ab.com